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<html lang="zh">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="static/css/style.css" />
	<link rel="stylesheet" href="static/css/iconfont.css" />
    <title>首页</title>
</head>
<body>
<div id="bigBox">
	<h1>请选择您想查看的空气质量数据对比</h1>
	<form action="/index" methods='GET'>	
		<button class="loginButton" type="SUBMIT">2020年北上广深全年空气质量情况</button>
	</form>
	<form action="/AOI">
		<button class="zhuceButton">2020年北上广深AQI全年走势图</button>
	</form>
	<form action="/PM">
		<button class="loginButton">2020年北上广深PM2.5全年走势折线图</button>
	</form>
	<form action="/guangzhou">
		<button class="zhuceButton">2020年广州PM2.5指数日历图</button>
	</form>
</div>

</body>
</html>